摘要
某百万千瓦汽轮发电机辅励磁机故障导致发电机失磁,在失磁保护动作跳开机端断路器的过程中,失步保护动作跳开500 k V断路器使事故范围扩大。根据故障录波数据分析计算出发电机失磁后机端导纳、机端阻抗的轨迹变化,详细分析了事故扩大的根本原因,并提出相应的改进措施以防止类似事故的再次发生。
The auxiliary exciter fault of a mega-kilowatt turbo-generator unit caused the loss of excitation, resulting in a set of out of step protection tripping of the 500 kV circuit breaker. Based on the data of the fault oscillograph, the trajectory of the terminal admittance and impedance is calculated. The basic causes for the expansion of the accident is analyzed, and some improvement measures are proposed to prevent similar incidents from happening again.
出处
《中国电力》
CSCD
北大核心
2016年第5期20-23,34,共5页
Electric Power
关键词
发电机
失磁
机端阻抗
轨迹变化
generator
loss of excitation
terminal impedance
trajectory
